I was just doing some prep work cleaning up the crossover tube itself, and I noticed two points of corrosion about the size of a pencil eraser and fairly deep on the thermostat side. They are right on the seal line, but like I said earlier there was no leak on that side. Is this something that I should ensure a little more RTV gets to those spots or should I just break down and get new parts? I can take pictures but I'm not sure how to post them right now.